Hi @tianaranjo ,
Could you please share a bit more about your scenario?
Could you please show more details about the PowerApps PowerShell cmdlet you used?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned. On my side, the amount of the result the Get-AdminPowerApp -EnvironmentName 'Default-9e51064f-xxxx-41a2-xxxx-9785a9d6c706' powershell cmdlet returns is more than ('>') the amount the PowerAppsforAdmins.GetAdminApps("Default-9e51064f-xxxx-41a2-xxxx-9785a9d6c706").value formula returns in PowerApps app.
The PowerShell cmdlet looks like below:
PowerShell Cmdlet
The PowerApps formula as below:

Currenly, within PowerApps, there is a records retrieve limits within the PowerAppsforAdmins.GetAdminApps() function. In default, it could only retrieve 250 records at most once time.
On your side, please check if you have typed a proper PowerApps PowerShell cmdlet in your PowerShell box. Also please check if you have added additional restricts to your Get-AdminPowerApp cmdlet.
Best regards,